Table 5: Lung function and the duration of occupational exposure across the study population (in years).
Duration of occupation across study population |
|
||||||
Spirometry test |
Percentage of predicted |
< 5 |
5 to 10 |
11 to 15 |
> 15 |
Total |
P-Value |
FEV1
|
< 30% |
0 |
0 |
1 |
8 |
9 |
|
30-49% |
1 |
2 |
14 |
41 |
58 |
|
|
50-79% |
14 |
20 |
19 |
16 |
64 |
|
|
> 80% |
100 |
48 |
30 |
6 |
184 |
|
|
Total |
115 |
70
|
64 |
71 |
320 |
0.001 |
|
FEV1/FVC
|
< 0.7 |
5 |
7 |
25 |
59 |
96 |
|
> 0.7 |
110 |
63 |
39 |
12 |
224 |
|
|
Total |
115 |
70 |
64 |
71 |
320 |
0.001 |
*p < 0.05